Trump holds the line on immigration as bipartisan plan emerges

By Richard Cowan WASHINGTON (Reuters) - A group of U.S. Senate Republicans and Democrats promoted an immigration proposal on Wednesday to step up border security and protect young illegal immigrants, but its prospects appeared uncertain as President Donald Trump urged Congress to support a tougher measure. The developments underlined the difficult path any immigration plan faces as Washington remains starkly divided on one of Trump's signature issues. Congress has repeatedly tried and failed to overhaul immigration policy over the past decade.